B1 Flashcards
List the clinical features ( S&S) of pneumonia ( at least 4 )
Symptoms
- Hyperpyrexia ( > 38C)
- Pleuritic chest pain
- Dyspnoea
- Haemoptysis
- Cough with mucopurulent sputum : Rusty sputum - pneumococcus
- Loss of appetite
- Fatigue , malaise , muscle aches
- Sinusitis , URI ( Legionella )
- Nausea and vomiting
- Diarrhoea ( Legionella )
- Chills and rigors
Signs
- Fever
- Hypotension
- Tachypnoea
- Confusion
- Tachycardia , bradycardia
- Central cyanosis
- Use of accessory respiratory muscles : Scalene muscle , SCM , Pectoralis major , trapezius , external, intercostal
-Signs of consolidation : Diminished chest expansion , Dull percussion note , Increased tactile vocal fremitus / vocal resonance , vocal, Bronchial breathing , Pleural rub
- Signs of pleural effusion : Stony dullness on percussion
- Herpes labialise : In pneumococcal infections
List lab investigations for pneumonia
1) Complete blood count ( CBC ) with differential leukocyte count
- to check MCV , MCH , MCHC , leukocytosis etc
2) Blood culture and sensitivity
- check bactermia
- done prior to antibiotics administration
3) Chest X - ray
- shows consolidation , pleural effusion , collapse , hilar lymphadenopathy
4) Sputum tests
- Gram stains
- Culture of colonies
5) Pulse oximetry
- see O2 saturation
6) Bronchoscopy
7) PCR
8) Serology
9) CT scan
10) ABG determination
- see pH of blood , paO2 , etc
State some complication of pneumonia
1) Lung abscess / empyema ( abscess in pleural space )
2) Septicemia , bacteremia
- leads to meningitis , endocarditis , septic arthritis , multi-organ failure
3) Difficulty breathing and ARDS
4) Collapse of the affected lobe / segment
5)Circulatory and respiratory failure -> shock
6) Thromboembolic disease
The mnemonic (…………) can be used as prognostic marker for community-acquired pneumonia
- CURB-65
C - Confusion
U - serum urea <7mmol /L
R - respiratory rate > 30 / min
B - diastolic BP< 60mmHg
65 - > 65 years of age
State some predisposing factor to pneumonia
1) Elderly
2) Infants
3)Immunocompromised / immunosuppressed
4) Cigarette smokers
5) Alcoholics
- via vomit aspiration
6) COPD , asthmatics , CF , bronchiectasis
7) Dysphagic people
- stroke , dementia or other neurologic conditions
8) Heart disease , liver cirrhosis , diabetes
9) ICU patients
10 ) Nursing home patients
11) IV drug users : Staph .aureus infection
COPD is characterised by persistent airflow limitation, usually progressive & not fully reversible with an enhanced chronic inflammatory response in the airways & lung in response to noxious particles and gases.
It includes ( ………… ) & ( ………….. )
COPD is characterised by persistent airflow limitation, usually progressive & not fully reversible with an enhanced chronic inflammatory response in the airways & lung in response to noxious particles and gases.
It includes ( chronic bronchitis ) & ( emphysema )
Chronic bronchitis is defined as a ( …………………………………… )
Emphysema is the ( …………………………………………………. )
Chronic bronchitis is defined as a ( chronic , productive cough on most days for 3 months per year for at least 2 successive years )
Emphysema is the ( abnormal & permanent enlargement of airways distal to the terminal bronchioles that is accompanied by destruction of the airspace walls )
State the etiological factors of COPD
1) Smoking , second hand smoking & air pollution
2) Occupational hazards : ( dust , silica , chemical fumes )
3) Low birth weight
4) Bronchial hyper-responsiveness
5) Alpha- antitrypsin-1 deficiency ( elastase inhibitor , elastase destroys elastin in RT )
Describe the clinical features of COPD
1) Chronic productive cough
2) Difficultly breathing / exerted dyspnoea
- progressive dyspnoea : chronic bronchitis
- Constant dyspnoea : emphysema
3) Cyanosis
4) Chronic chest infections
5) Weight loss , tiredness
6 ) Pedal edema
- If Cor pulmonare occurs
7) Barrel- chest
- chest wall in AP plane increase in size
8) Expiratory pursed-lip breathing
9) Signs of CO2 retention
- flapping tremors ( asterixis )
- bonding pulse
- obtundation ( less than full alertness )
10) Signs of rt heart failure
- pedal edema
- ascites
- hepatomegaly
- JVP
11) Resonant percussion note
12 Crackles at lung bass
Describe the investigation of COPD
1) Spirometry
- FEV1 <80 % and FEV1/FVC <70% strongly suggest COPD
2) CXR
- shows bullae ( large areas with absence of lung markings )
- hypertranslucent lung field & flattened diaphragm
- chest shows hyperexpansion
3) Arterial blood gas analysis
- shows hypoxia and hypercapnia
4) Bronchiodilator trial
- after administering B2 agonist , if spirometry shows > 15% improvement in FRV1 -> bronchial asthma
- if < 15% improvement -> COPD
5) Culture & sensitivity of sputum
6) AAT deficiency screening
- done in young pt . with family history
Describe the treatment of COPD
1) Long term oxygen therapy (LTOT )
2) Smoking cessation
3) Bronchodilators
4) Oral corticosteroids
- to decrease freq. of acute exacerbation
- chronic use not recommended
5) Antibiotics is superadded infection occurs
6) Pulmonary rehab
7) Surgery
- lung reduction , transplant
State precipitating factors of asthma
A) Genetics : play more of a role in childhood asthma
B) Enviromental : pet dander , pollen m cigarette smoke , fungi , stress
- plays more of a role in adults / elderly asthma
C) Medicine
- B-blockers cause bronchospasm by inhibiting B2 receptors
- NSAIDs inhibit COX , diverting arachidonic acid production to LOX pathway , producing asthmogenic leukotriene
- oral contraceptives , cholinergic agents
D) Latex allergy
State the clinical features of asthma
Symptoms
1) Recurrent episodes of wheezing
2) Breathlessness
3) Chest tightness
4) Cough
5) Diurnal pattern
- symptoms & lung function worse in early morning
Signs
1) Tachycardia
2) Tachypnoea
3) Use of accessory respiratory muscle
4) Hyper-inflated chest
5) Hyper-resonant percussion
6) Breath sounds ( harsh vesicular breathing with prolonged expiration )
7) wheeze
8) Eosinophilia
Describe the investigation of asthma
1) Pulmonary function test
2) Peak expiratory flow rate
- measured using a peak flow meter which measure the max velocity of air expelled by an individual
- shows lower than normal value
3) Spirometry
- FEV1 <80%
- FEV1 / FVC <70%
- Following administration of bronchodilator , an improvement of at least 15% is diagnostic of bronchial asthma
4) CXR
- normal , but may show hyper inflated chest
5) Sputum differential eosinophil count>2%
6) CBC
- Shows eosinophilia
7) ABG analysis
Describe the management of asthma
1) Give O2
2) Minimize exposure of allergens
3) Cease smoking
4) Step-wise smoking
Step 1 : SABA ( salbutamol , terbutaline )
Step 2 : SABA + low dose ICS ( beclomethasone , budesonide , fluticasone )
Step 3 : SABA + LABA ( salmeterol ) + low dose ICS
Step 4 : SABA + LABA + high dose ICS / theophylline / LT antagonist
Step 5 : SABA + LABA + high dose ICS+ OCS
Describe the Pathogenesis of tuberculosis
- infection through inhalation of aerosolised droplet nuclei containing Mycobacterium tuberculosis or ingesting non sterilised milk (M. Bovis )
- m/o lodges into the alveoli
- leads to recruitment of macrophages & lymphocytes
- Macrophages transform into epitheloid cells and Langhans cell , forming a tuberculous granuloma
- granulomas aggregate to form Ghon focus in the periphery of the lung
- the primary complex get encased in a fibrous capsule which limits spread of bacilli ( latent TB)
- the Ghon’s complex may also undergo fibrosis or calcification & form Ranke complex
- if bacilli managed to spread hematogenously -> dormancy in other organs
Describe the clinical features of tuberculosis
Symptoms
- haemoptysis
- chronic cough
- fever and chills
- weight loss and weakness ( consumption )
- dyspnoea
- pleuritic chest pain
- nights sweats
Signs
- lymphadenopathy
- post - tussive crackles
- fever
- signs of consolidation
- unresolved pneumonia
- pneumothorax
- pleural effusion
Ghon’s focus is seen in ( ……………… ) and located at the ( ……………….. )
Simon focus is seen in ( ………………… ) and located at the (…………………. )
Ghon’s focus is seen in ( primary TB) and located at the ( middle or lower lobes )
Simon focus is seen in ( secondary TB ) and located at the ( apex of upper lobes as this is where there is highest concentration of O2 and where aerobic bacteria can thrive )
Describe the management of TB
Intensive phase ( HRZEP)
- take drugs daily or 3 x per week for 2 mths
- isoniazid 300 mg + rifampin 450mg + pyrazinamide 1500 mg + ethambutol 800 mg + pyridoxine 10mg
Continuous phase ( HRP)
- take drugs daily / 3 x weekly for 4 mths
- isoniazids 300 mg + rifampin 450mg + pyridoxine 10mg
Pott’s disease typically affects the ( …………………………… )
Pott’s disease typically affects the ( thoracic and lumbrosacral spine , knees and hips )
Describe the manifestation of TB in oral cavity
- appears as Stellate ulcers on dorsum of tongue
- also include palate , lips , buccal mucosa , gingiva , palatine tonsils , floor of mouth
-ulcers may present as non-healing ulcers or long duration , painless ulcers
- cervical lymphadenopathy ( matted lymph nodes ) + draining sinus
State some common causes of pleural effusion ( Transudative , exudative types )
Transudative ( protein <30g/L )
I) Congestive heart failure
II) Hypoproteinemia ( nephrotic syndrome , liver cirrhosis , malnutrition )
III) myxedema
IV) pericardial disease
Exudative ( protein >30g/L )
I) Tuberculosis
II) Malignancy
III) Acute rheumatic fever
IV) Pneumonia
V) pulmonary embolism
VI) SLE
VII) Uremia
VII) pancreatitis
IX) hemothorax , chylothorax
X)Meig’s syndrome
State the clinical feature ( S&S ) of pleural effusion
Symptoms
- dyspnoea
- cough with sputum
- pleuritic chest pain
- Hemoptysis
- fever
- weight loss
- trauma
- history of cancer , cardiac surgery and other symptoms related to the underlying cause
Signs
- blunting of costophrenic angle on CXR
- asymmetric chest expansion ( diminished on affected side )
- tracheal deviation to opposite side
- egophony above the level of pleural effusion
- stony dullness on percussion
- absent tactile fremitus
- decreased / absent breath sounds
- localised pleural friction rub
- raised JVP
- ascites
- peripheral edema
- unilateral leg swelling
- Tachypnoea
( ……………….. ) on percussion is a characteristic finding of pleural effusion , as well as ( …………………. ) on chest X-ray.
( Stony dullness ) on percussion is a characteristic finding of pleural effusion , as well as ( blunting of the costophrenic angle ) on chest X-ray.
Inspection - Tachypnoea
Palpatation- reduce expansion on R
- Trachea and apex may be moved to L
Percussion - stony dull
- R mid and lower zones
Auscultation - absent breath sounds ash vocal resonance R base
- Bronchial breathing or crackles above effusion